Magnetic resonance imaging (MRI)−guided biopsy

Definition of MRI-guided biopsy
National Cancer Institute

MRI-guided biopsy

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A procedure that uses an MRI scan to find an abnormal area in the breast or prostate to guide the removal of a tissue sample from that area with a needle. The tissue sample is then checked under a microscope for signs of disease, such as cancer. An MRI-guided biopsy may be done when a lump or mass cannot be felt or when the abnormal area cannot be seen on other imaging tests.

Source: NCI Dictionary of Cancer Terms